1 Card of any rarity is Traditional Foil A Collector Booster contains: 15 Magic: The Gathering cards includes 812 Traditional Foil cards
The only down side that I've found so far is, being able separate out which foils you have or don't have in your collection
You can effectively get rid of a character or draw two cards, both great outcomes for you, and a deal your opponent has to make at the same time
Youre looking to assemble a veritable fleet of cards like Gaelicat, Rook Turret, and Dragoon's Wyvern here, backed up by job select equipment and removal
Go to any Card detail page to see current prices for different grades and historic prices too
Note there are no restrictions here beyond that any counter counts from anyone's stuff, and then when it dies you can send them to a dork like your Commander or other stuff and then this is tucked